Roger Winston Bailey

US Patent:

6366417, Apr 2, 2002

Filed:

May 13, 1998

Appl. No.:

09/078437

Inventors:

Harlan Mathews - Boulder CO
Michael McNeil - Nederland CO
Roger G. Bailey - Longmont CO

Assignee:

Maxtor Corporation - Longmont CO

International Classification:

G11B 509

US Classification:

360 46, 360 65

Abstract:

The present invention relates to circuitry for processing an analog read signal, such as a signal produced by a magnetoresistive head, in a magnetic data storage system. The circuitry processes the analog signal before the signal reaches the detector which converts the analog signal into a digital signal representative of the data originally stored on the magnetic medium. In one embodiment, the invention comprises circuitry for equalizing the amplitudes of the positive and negative pulses in the analog read signal. In another embodiment, the invention comprises circuitry for reducing the baseline shift of the analog read signal. The invention may be used in magnetic data storage systems using any conventional data detection method.

US Patent:

46334238, Dec 30, 1986

Filed:

Mar 27, 1984

Appl. No.:

6/593723

Inventors:

Roger G. Bailey - Lafayette CO

Assignee:

Storage Technology Corporation - Louisville CO

International Classification:

G05B 1101

US Classification:

364571

Abstract:

Synchronous or coherent error appearing as one or more FM sidebands in the high frequency pulse signal of an incremental position encoding digital tachometer or the like and in an error signal having a magnitude representing the difference in velocity between that indicated by the high frequency signal and a desired velocity is suppressed in the error signal by a coherent error correction signal of varying magnitude which is combined with the error signal, is generated as a function of mechanical angular position and is identical from cycle to each cycle of the tachometer for the same mechanical angular position.

US Patent:

53555023, Oct 11, 1994

Filed:

Sep 2, 1992

Appl. No.:

7/939051

Inventors:

Lester Schowe - Longmont CO
Roger Bailey - Longmont CO

Assignee:

Maxtor Corporation - San Jose CA

International Classification:

G06F 104

US Classification:

395750

Abstract:

A clock generator circuit for use with a low power data storage unit includes a resonator circuit for providing a first output frequency resonating at a fundamental frequency of a quartz crystal. A frequency multiplication circuit for multiplies the first output frequency by a predetermined factor to produce a second output frequency greater than the first output frequency. This second output frequency is coupled to the data storage unit and is used during normal read/write mode of operation. In a low power mode of operation, a switching network couples the first output frequency directly to the data storage unit so as to reduce the overall power consumption.

US Patent:

56966415, Dec 9, 1997

Filed:

May 10, 1995

Appl. No.:

8/438643

Inventors:

Roger G. Bailey - Longmont CO

Assignee:

Maxtor Corporation - Longmont CO

International Classification:

G11B 503
G11B 586
G11B 509

US Classification:

360 66

Abstract:

The magnetic recording system of the present invention relaxes/reduces the magnetic energy in a magnetic recording head at the end of a write operation. In one embodiment, the magnetic recording system (10) includes a magnetic recording media (18), a recording head (14), and a biasing pattern (64) stored along a portion of the media (18). The biasing pattern (64) provides a biasing effect on the head (14) that provides controlled reduction of the magnetic energy domains in the head (14).

US Patent:

45959595, Jun 17, 1986

Filed:

Aug 21, 1984

Appl. No.:

6/642933

Inventors:

Roger G. Bailey - Lafayette CO

Assignee:

Storage Technology Corporation - Louisville CO

International Classification:

G11B 509
G11B 502
H03K 5153

US Classification:

360 67

Abstract:

A peak detector circuit has a first stage and a second stage. The first stage has a short time constant so that the level of the peaks are detected with a high bandwidth. A second stage follows the peaks detected in the first stage. The capacitor in the second stage is rapidly discharged when a new peak is detected by the first stage.

US Patent:

59431776, Aug 24, 1999

Filed:

May 26, 1995

Appl. No.:

8/451489

Inventors:

Harlan Mathews - Boulder CO
Michael McNeil - Nederland CO
Roger G. Bailey - Longmont CO

Assignee:

Maxtor Corporation - Longmont CO

International Classification:

G11B 535

US Classification:

360 65

Abstract:

The present invention relates to circuitry for processing an analog read signal, such as a signal produced by a magnetoresistive head, in a magnetic data storage system. The circuitry processes the analog signal before the signal reaches the detector which converts the analog signal into a digital signal representative of the data originally stored on the magnetic medium. In one embodiment, the invention comprises circuitry for equalizing the amplitudes of the positive and negative pulses in the analog read signal. In another embodiment, the invention comprises circuitry for reducing the baseline shift of the analog read signal. The invention may be used in magnetic data storage systems using any conventional data detection method.